WGU C175/D426 DATA MANAGEMENT FOUNDATIONS OA EXAM NEWEST 2025 ACTUAL EXAM 2
LATEST VERSIONS 300 QUESTIONS AND CORRECT DETAILED ANSWERS WITH RATIONALES (100%
CORRECT AND VERIFIED ANSWERS)|ALREADY GRADED A+
Associative Entity - ANSWER-An associative entity is an element of the entity-relationship
model. All relationships for the associative entity should be many.
Attribute - ANSWER-An attribute is a property or characteristic of an entity.
Binary relationship - ANSWER-A binary relationship is a relationship between two entity types.
Candidate Key - ANSWER-Is any column or a combination of columns that can qualify as unique
key in database.
Cardinality - ANSWER-Cardinality represents the maximum number of entities that can be
involved in a particular relationship.
Cartesian product - ANSWER-Usually the result of a missing join condition or a method of
expanding the data of 1 table by the number of rows in the second table.
Cascade Delete - ANSWER-Will delete all records that reference the primary key
column subquery - ANSWER-Returns a single column of one or more values.
data encryption - ANSWER-When data is encrypted, it is changed, bit by bit or character by
character, into a form that looks totally garbled. It can and must be reconverted, or decrypted,
back to its original form to be of use.
Data normalization - ANSWER-Is a methodology for organizing attributes into tables so that
redundancy among the non-key attributes is eliminated.
Data volatility - ANSWER-Describes how often stored data is updated.
Data Volume Assessment - ANSWER-Understanding of how much data will be in a database or a
table within a database
Database - ANSWER-A database is a collection of information that is organized so that it can
easily be accessed, managed, and updated.
DCL - ANSWER-Data control language is used to control access to data stored in a database.
, DDL - ANSWER-Data definition language - involves instructing the DBMS software on what
tables will be in the database, what attributes will be in the tables, which attributes will be
indexed, and so forth.
Definer - ANSWER-Definer is a MySQL term where AuthID is the same for another DBMS
Denormalization - ANSWER-The act of duplicating data in a database for performance or the
preservation of historical information
disaster recovery - ANSWER-Involves rebuilding an entire information system or significant parts
of one after a catastrophic natural disaster such as a hurricane, tornado, earthquake, building
collapse, or even a major fire.
DML - ANSWER-Data manipulation language refers to the four basic operations that can and
must be performed on data stored in any DBMS: data retrieval, data update, insertion of new
records, and deletion of existing records.
E-R model - ANSWER-An E-R model is a data model for describing a database in an abstract way.
embedded mode - ANSWER-The SELECT command is embedded within the lines of a higher-
level language program and functions as an input or "read" statement for the program.
Entity - ANSWER-An entity is an object or event in our environment that we want to keep track
of.
Foreign Key - ANSWER-Is a field (or collection of fields) in one table that uniquely identifies a
row of another table.
Index - ANSWER-Used to help a DBMS find data quickly
Inner Join - ANSWER-Shows row that have matches in both tables
Intersection Data - ANSWER-Intersection Data associated with the concatenation of two
segments.
Join - ANSWER-Joins 2 tables together
logical view - ANSWER-Is a mapping onto a physical table or tables that allows an end user to
access only a specified portion of data.
Modality - ANSWER-Modality represents the minimum number of entity occurrences that can
be involved in a relationship.
outer join - ANSWER-Shows rows in one table that have no match in the other table. Two kinds
of outer joins are left and right joins.
LATEST VERSIONS 300 QUESTIONS AND CORRECT DETAILED ANSWERS WITH RATIONALES (100%
CORRECT AND VERIFIED ANSWERS)|ALREADY GRADED A+
Associative Entity - ANSWER-An associative entity is an element of the entity-relationship
model. All relationships for the associative entity should be many.
Attribute - ANSWER-An attribute is a property or characteristic of an entity.
Binary relationship - ANSWER-A binary relationship is a relationship between two entity types.
Candidate Key - ANSWER-Is any column or a combination of columns that can qualify as unique
key in database.
Cardinality - ANSWER-Cardinality represents the maximum number of entities that can be
involved in a particular relationship.
Cartesian product - ANSWER-Usually the result of a missing join condition or a method of
expanding the data of 1 table by the number of rows in the second table.
Cascade Delete - ANSWER-Will delete all records that reference the primary key
column subquery - ANSWER-Returns a single column of one or more values.
data encryption - ANSWER-When data is encrypted, it is changed, bit by bit or character by
character, into a form that looks totally garbled. It can and must be reconverted, or decrypted,
back to its original form to be of use.
Data normalization - ANSWER-Is a methodology for organizing attributes into tables so that
redundancy among the non-key attributes is eliminated.
Data volatility - ANSWER-Describes how often stored data is updated.
Data Volume Assessment - ANSWER-Understanding of how much data will be in a database or a
table within a database
Database - ANSWER-A database is a collection of information that is organized so that it can
easily be accessed, managed, and updated.
DCL - ANSWER-Data control language is used to control access to data stored in a database.
, DDL - ANSWER-Data definition language - involves instructing the DBMS software on what
tables will be in the database, what attributes will be in the tables, which attributes will be
indexed, and so forth.
Definer - ANSWER-Definer is a MySQL term where AuthID is the same for another DBMS
Denormalization - ANSWER-The act of duplicating data in a database for performance or the
preservation of historical information
disaster recovery - ANSWER-Involves rebuilding an entire information system or significant parts
of one after a catastrophic natural disaster such as a hurricane, tornado, earthquake, building
collapse, or even a major fire.
DML - ANSWER-Data manipulation language refers to the four basic operations that can and
must be performed on data stored in any DBMS: data retrieval, data update, insertion of new
records, and deletion of existing records.
E-R model - ANSWER-An E-R model is a data model for describing a database in an abstract way.
embedded mode - ANSWER-The SELECT command is embedded within the lines of a higher-
level language program and functions as an input or "read" statement for the program.
Entity - ANSWER-An entity is an object or event in our environment that we want to keep track
of.
Foreign Key - ANSWER-Is a field (or collection of fields) in one table that uniquely identifies a
row of another table.
Index - ANSWER-Used to help a DBMS find data quickly
Inner Join - ANSWER-Shows row that have matches in both tables
Intersection Data - ANSWER-Intersection Data associated with the concatenation of two
segments.
Join - ANSWER-Joins 2 tables together
logical view - ANSWER-Is a mapping onto a physical table or tables that allows an end user to
access only a specified portion of data.
Modality - ANSWER-Modality represents the minimum number of entity occurrences that can
be involved in a relationship.
outer join - ANSWER-Shows rows in one table that have no match in the other table. Two kinds
of outer joins are left and right joins.
